Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Walmart Inc
WMT
|
+$43.6M |
| 2 |
Apple
AAPL
|
+$40.9M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$37.7M |
| 4 |
Citigroup
C
|
+$34.2M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$32.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$189M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 3 |
NVIDIA
NVDA
|
+$115M |
| 4 |
Tesla
TSLA
|
+$52M |
| 5 |
Meta Platforms (Facebook)
META
|
+$49M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.42% |
| 2 | Consumer Discretionary | 0.2% |
| 3 | Healthcare | 0.17% |
| 4 | Industrials | 0.15% |
| 5 | Communication Services | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1801
PUT
Helmerich & Payne
HP
$3.53B
| $2.37M | ﹤0.01% |
66,400
+33,600
| +102% | +$1.45M |
|
1802
Pfizer
PFE
$140B
| $2.37M | ﹤0.01% |
58,169
+4,179
| +8% | +$180K |
|
|
LTHM
1803
PUT
DELISTED
Livent Corporation
LTHM
| $2.37M | ﹤0.01% |
109,100
+86,000
| +372% | +$1.99M |
|
1804
PUT
Corpay
CPAY
$24.2B
| $2.36M | ﹤0.01% |
11,200
+9,200
| +460% | +$1.87M |
|
1805
PUT
HDFC Bank
HDB
$119B
| $2.36M | ﹤0.01% |
70,800
+64,200
| +973% | +$2.15M |
|
1806
PUT
Prosperity Bancshares
PB
$8.77B
| $2.36M | ﹤0.01% |
38,300
+36,700
| +2,294% | +$2.61M |
|
1807
Alliant Energy
LNT
$19.4B
| $2.35M | ﹤0.01% |
44,011
-7,248
| -14% | -$386K |
|
1808
PUT
Southern Copper
SCCO
$141B
| $2.35M | ﹤0.01% |
33,224
+11,973
| +56% | +$814K |
|
1809
CALL
Invesco DB Commodity Index Tracking Fund
DBC
$1.73B
| $2.34M | ﹤0.01% |
98,700
-135,100
| -58% | -$3.23M |
|
|
SPWR
1810
DELISTED
SunPower Corporation Common Stock
SPWR
| $2.33M | ﹤0.01% |
+168,592
| New | +$2.64M |
|
1811
CALL
Barclays
BCS
$94.1B
| $2.33M | ﹤0.01% |
323,800
+210,600
| +186% | +$1.74M |
|
|
SPWR
1812
PUT
DELISTED
SunPower Corporation Common Stock
SPWR
| $2.31M | ﹤0.01% |
167,200
-156,500
| -48% | -$2.45M |
|
|
TE
1813
PUT
T1 Energy
TE
$1.4B
| $2.31M | ﹤0.01% |
259,900
+248,900
| +2,263% | +$2.16M |
|
|
CYBR
1814
PUT
DELISTED
CyberArk
CYBR
| $2.31M | ﹤0.01% |
15,600
-24,700
| -61% | -$3.45M |
|
1815
Cardinal Health
CAH
$53.4B
| $2.31M | ﹤0.01% |
30,561
-1,449
| -5% | -$109K |
|
1816
CALL
Greif
GEF
$4.47B
| $2.31M | ﹤0.01% |
36,400
+14,600
| +67% | +$979K |
|
1817
CALL
Autoliv
ALV
$8.6B
| $2.31M | ﹤0.01% |
24,700
+13,900
| +129% | +$1.23M |
|
|
CS
1818
PUT
DELISTED
Credit Suisse Group
CS
| $2.31M | ﹤0.01% |
2,591,200
+1,793,000
| +225% | +$5M |
|
1819
CALL
Boston Beer
SAM
$1.88B
| $2.3M | ﹤0.01% |
7,000
-300
| -4% | -$103K |
|
1820
CALL
United Microelectronic
UMC
$48.9B
| $2.3M | ﹤0.01% |
262,600
-95,600
| -27% | -$775K |
|
1821
CALL
Equinox Gold
EQX
$7.32B
| $2.3M | ﹤0.01% |
446,000
-7,900
| -2% | -$32.9K |
|
|
ITCI
1822
DELISTED
Intra-Cellular Therapies Inc.
ITCI
| $2.29M | ﹤0.01% |
42,348
+36,159
| +584% | +$1.75M |
|
1823
CALL
FerroAtlántica
GSM
$628M
| $2.29M | ﹤0.01% |
464,100
+462,000
| +22,000% | +$2.13M |
|
1824
CALL
Nextpower Inc
NXT
$15.2B
| $2.29M | ﹤0.01% |
+63,200
| New | +$2M |
|
1825
PUT
Philips
PHG
$25.4B
| $2.29M | ﹤0.01% |
145,634
+39,825
| +38% | +$573K |
|
Similar funds
Simplex Trading's Q1 2023 Portfolio in Review
As of Q1 2023, Simplex Trading held 10,803 positions worth $114B, up 24% from $91.9B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading deployed $10.1B of net new capital in Q1 2023, opening 1,536 new positions and adding to 3,665 existing holdings. Its largest new stake was Walmart Inc: 918,957 shares worth $45.2M.
By sector, the portfolio is most concentrated in Technology at 0.42% of assets, up from 0.35% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Meta Platforms (Facebook), an estimated $49M trimmed.
- Simplex Trading's largest Q1 2023 buy was Walmart Inc: 918,957 shares worth $45.2M.
- Simplex Trading added most to Apple in Q1 2023, an estimated $40.9M increase.
- Simplex Trading's biggest Q1 2023 reduction was Meta Platforms (Facebook), cutting an estimated $49M.
- Simplex Trading fully exited Amazon in Q1 2023, selling an estimated $189M.
- Simplex Trading's ten largest holdings make up 38% of its $114B portfolio in Q1 2023.
- Simplex Trading opened 1,536 new positions and closed 1,729 in Q1 2023.
- Simplex Trading's portfolio value rose 24% quarter-over-quarter to $114B.
Based on Simplex Trading's 13F filing for Q1 2023, filed 27 Apr 2023.